<?php
defined('BASEPATH') OR exit('No direct script access allowed');
// ------------------------------------------------------------------------

if ( ! function_exists('xj_is_php'))
{
	/**
	 * Determines if the current version of PHP is equal to or greater than the supplied value
	 * 判断当前运行的 PHP 版本是否高于或等于你提供的版本号。
	 * @param	string
	 * @return	bool	TRUE if the current version is $version or higher
	 */
	function xj_is_php($version)
	{
		static $_is_php;
		$version = (string) $version;

		if ( ! isset($_is_php[$version]))
		{
			$_is_php[$version] = version_compare(PHP_VERSION, $version, '>=');
		}

		return $_is_php[$version];
	}
}
// ------------------------------------------------------------------------

if ( ! function_exists('xj_is_really_writable'))
{
	/**
	 * Tests for file writability
	 *
	 * is_writable() returns TRUE on Windows servers when you really can't write to
	 * the file, based on the read-only attribute. is_writable() is also unreliable
	 * on Unix servers if safe_mode is on.
	 *
	 * @link	https://bugs.php.net/bug.php?id=54709
	 * @param	string
	 * @return	bool
	 */
	function xj_is_really_writable($file)
	{
		// If we're on a Unix server with safe_mode off we call is_writable
		if (DIRECTORY_SEPARATOR === '/' && (xj_is_php('5.4') OR ! ini_get('safe_mode')))
		{
			return is_writable($file);
		}

		/* For Windows servers and safe_mode "on" installations we'll actually
		 * write a file then read it. Bah...
		 */
		if (is_dir($file))
		{
			$file = rtrim($file, '/').'/'.md5(mt_rand());
			if (($fp = @fopen($file, 'ab')) === FALSE)
			{
				return FALSE;
			}

			fclose($fp);
			@chmod($file, 0777);
			@unlink($file);
			return TRUE;
		}
		elseif ( ! is_file($file) OR ($fp = @fopen($file, 'ab')) === FALSE)
		{
			return FALSE;
		}

		fclose($fp);
		return TRUE;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_load_class'))
{
	/**
	 * Class registry
	 *
	 * This function acts as a singleton. If the requested class does not
	 * exist it is instantiated and set to a static variable. If it has
	 * previously been instantiated the variable is returned.
	 *
	 * @param	string	the class name being requested
	 * @param	string	the directory where the class should be found
	 * @param	string	an optional argument to pass to the class constructor
	 * @return	object
	 */
	function &xj_load_class($class, $directory = 'libraries', $param = NULL)
	{
		static $_classes = array();

		// Does the class exist? If so, we're done...
		if (isset($_classes[$class]))
		{
			return $_classes[$class];
		}

		$name = FALSE;
		// Look for the class first in the local application/libraries folder
		// then in the native system/libraries folder
		$file_path_str = '';
		if (isset($_ENV['XJ_APP_DIR_PATH_ARR']) and is_array($_ENV['XJ_APP_DIR_PATH_ARR'])){
			$found = FALSE;
			$app_dir_arr = $_ENV['XJ_APP_DIR_PATH_ARR'];//array_reverse($_ENV['XJ_APP_DIR_PATH_ARR']);
			foreach ($app_dir_arr as $app_dir){
				$file_path = $app_dir.$directory.DIRECTORY_SEPARATOR.$class.'.php';
				$file_path_str = $file_path_str."\n[".$file_path."]";
				if (file_exists($file_path))
				{
					$name = $class;
					if ($app_dir == BASEPATH.'xj_core'.DIRECTORY_SEPARATOR)
						$name = 'XJ_'.$class;
					if (class_exists($name, FALSE) === FALSE)
					{
						require_once($file_path);
					}
					break;
				}
				$file_path = $_ENV['XJ_APPPATH'].$directory.DIRECTORY_SEPARATOR.xj_config_item('subclass_prefix').$class.'.php';
				if (strpos($file_path_str, $file_path) === FALSE){ 
					$file_path_str = $file_path_str."\n[".$file_path."]";
					if (file_exists($file_path))
					{
						$name = xj_config_item('subclass_prefix').$class;
			
						if (class_exists($name, FALSE) === FALSE)
						{
							require_once($file_path);
						}
						break;
					}
				}
			}
			/*$file_path = BASEPATH.$directory.DIRECTORY_SEPARATOR.$class.'.php';
			if (strpos($file_path_str, $file_path) === FALSE){ 
				$file_path_str = $file_path_str."\n[".$file_path."]";
				// Is the request a class extension? If so we load it too
				if (file_exists($file_path))
				{
					$name = 'XJ_'.$class;
				
					if (class_exists($name, FALSE) === FALSE)
					{
						require_once($file_path);
					}
				}
			}*/
		}else{
			$file_path = $_ENV['XJ_APPPATH'].$directory.DIRECTORY_SEPARATOR.$class.'.php';
			if (strpos($file_path_str, $file_path) === FALSE){ 
				$file_path_str = $file_path_str."\n[".$file_path."]";
				if (file_exists($file_path))
				{
					$name = $class;
				
					if (class_exists($name, FALSE) === FALSE)
					{
						require_once($file_path);
					}
				}
			}
			$file_path = $_ENV['XJ_APPPATH'].$directory.DIRECTORY_SEPARATOR.xj_config_item('subclass_prefix').$class.'.php';
			if (strpos($file_path_str, $file_path) === FALSE){ 
				$file_path_str = $file_path_str."\n[".$file_path."]";
				// Is the request a class extension? If so we load it too
				if (file_exists($file_path))
				{
					
					$name = xj_config_item('subclass_prefix').$class;
		
					if (class_exists($name, FALSE) === FALSE)
					{
						require_once($file_path);
					}
				}
			}
			if (isset($_ENV['XJ_PUBPATH'])){
				$file_path = $_ENV['XJ_PUBPATH'].$directory.DIRECTORY_SEPARATOR.$class.'.php';
				if (strpos($file_path_str, $file_path) === FALSE) {
					$file_path_str = $file_path_str."\n[".$file_path."]";
					// Is the request a class extension? If so we load it too
					if (file_exists($file_path))
					{
						$name = $class;
						
						if (class_exists($name, FALSE) === FALSE)
						{
							require_once($file_path);
						}
					}
				}
				$file_path = $_ENV['XJ_PUBPATH'].$directory.DIRECTORY_SEPARATOR.xj_config_item('subclass_prefix').$class.'.php';
				if (strpos($file_path_str, $file_path) === FALSE){
					$file_path_str = $file_path_str."\n[".$file_path."]";
					// Is the request a class extension? If so we load it too
					if (file_exists($file_path))
					{
							
						$name = xj_config_item('subclass_prefix').$class;
				
						if (class_exists($name, FALSE) === FALSE)
						{
							require_once($file_path);
						}
					}
				}
				
			}
			$file_path = BASEPATH.'xj_core'.DIRECTORY_SEPARATOR.$directory.DIRECTORY_SEPARATOR.$class.'.php';
			if (strpos($file_path_str, $file_path) === FALSE){
				$file_path_str = $file_path_str."\n[".$file_path."]";
				if (file_exists($file_path))
				{
					$name = 'XJ_'.$class;
			
					if (class_exists($name, FALSE) === FALSE)
					{
						require_once($file_path);
					}
				}
			}
		}
		// Did we find the class?
		if ($name === FALSE)
		{
			// Note: We use exit() rather than show_error() in order to avoid a
			// self-referencing loop with the Exceptions class
			xj_set_status_header(503);
			echo 'Unable to locate the specified class: '.$class.'.php. path:'.$file_path_str;
			exit(5); // EXIT_UNK_CLASS
		}

		// Keep track of what we just loaded
		xj_is_loaded($class);
		if (class_exists($name, FALSE) === FALSE)
		{
			xj_set_status_header(503);
			echo 'Unable to locate the specified class: '.$class.'.php. name:'.$name.'. path:'.$file_path_str;
			exit(5); // EXIT_UNK_CLASS
		}
		try {
			$_classes[$class] = isset($param)
				? new $name($param)
				: new $name();
		} catch (Exception $e) {
			xj_set_status_header(503);
			echo 'Caught exception: ',  $e->getMessage(), "\n";
			echo 'Unable to locate the specified class: '.$class.'.php. name:'.$name.'. path:'.$file_path_str;
			exit(5); // EXIT_UNK_CLASS
		}
		return $_classes[$class];
	}
}

// --------------------------------------------------------------------

if ( ! function_exists('xj_is_loaded'))
{
	/**
	 * Keeps track of which libraries have been loaded. This function is
	 * called by the load_class() function above
	 *
	 * @param	string
	 * @return	array
	 */
	function &xj_is_loaded($class = '')
	{
		static $_is_loaded = array();

		if ($class !== '')
		{
			$_is_loaded[strtolower($class)] = $class;
		}

		return $_is_loaded;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_get_config'))
{
	/**
	 * Loads the main config.php file
	 *
	 * This function lets us grab the config file even if the Config class
	 * hasn't been instantiated yet
	 *
	 * @param	array
	 * @return	array
	 */
	function &xj_get_config(Array $replace = array())
	{
		static $config;

		if (empty($config))
		{
			
			if (isset($_ENV['XJ_APP_DIR_PATH_ARR']) and is_array($_ENV['XJ_APP_DIR_PATH_ARR'])){
				$found = FALSE;
				$file_path_str = '';
				$app_dir_arr = array_reverse($_ENV['XJ_APP_DIR_PATH_ARR']);
				foreach ($app_dir_arr as $app_dir){
					$file_path = $app_dir.'config'.DIRECTORY_SEPARATOR.'config.php';
					$file_path_str = $file_path_str."\n[".$file_path."]";
					if (file_exists($file_path))
					{
						$found = TRUE;
						require($file_path);
					}
		
					// Is the config file in the environment folder?
					if (file_exists($file_path =$app_dir.'config'.DIRECTORY_SEPARATOR.$_ENV['XJ_ENV'].DIRECTORY_SEPARATOR.'config.php'))
					{
						$file_path_str = $file_path_str."\n[".$file_path."]";
						$found = TRUE;
						require($file_path);
					}
				}
				if ( ! $found)
				{
					xj_set_status_header(503);
					echo 'The configuration file does not exist.'.$file_path_str.'';
					exit(3); // EXIT_CONFIG
				}
				
				// Does the $config array exist in the file?
				if ( ! isset($config) OR ! is_array($config))
				{
					xj_set_status_header(503);
					echo 'Your config file does not appear to be formatted correctly.'.$file_path_str.'';
					exit(3); // EXIT_CONFIG
				}
			}else{
				$file_path = $_ENV['XJ_APPPATH'].'config'.DIRECTORY_SEPARATOR.'config.php';
				$found = FALSE;
				if (file_exists($file_path))
				{
					$found = TRUE;
					require($file_path);
				}
				
				// Is the config file in the environment folder?
				if (file_exists($file_path = $_ENV['XJ_APPPATH'].'config'.DIRECTORY_SEPARATOR.$_ENV['XJ_ENV'].DIRECTORY_SEPARATOR.'config.php'))
				{
					require($file_path);
				}
				elseif ( ! $found)
				{
					xj_set_status_header(503);
					echo 'The configuration file does not exist.['.$file_path.']';
					exit(3); // EXIT_CONFIG
				}
				
				// Does the $config array exist in the file?
				if ( ! isset($config) OR ! is_array($config))
				{
					xj_set_status_header(503);
					echo 'Your config file does not appear to be formatted correctly.['.$file_path.']';
					exit(3); // EXIT_CONFIG
				}
			}
		}

		// Are any values being dynamically added or replaced?
		foreach ($replace as $key => $val)
		{
			$config[$key] = $val;
		}

		return $config;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_config_item'))
{
	/**
	 * Returns the specified config item
	 *
	 * @param	string
	 * @return	mixed
	 */
	function xj_config_item($item)
	{
		static $_config;

		if (empty($_config))
		{
			// references cannot be directly assigned to static variables, so we use an array
			$_config[0] =& xj_get_config();
		}

		return isset($_config[0][$item]) ? $_config[0][$item] : NULL;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_get_mimes'))
{
	/**
	 * Returns the MIME types array from config/mimes.php
	 *
	 * @return	array
	 */
	function &xj_get_mimes()
	{
		static $_mimes;

		if (empty($_mimes))
		{
			if (file_exists($_ENV['XJ_APPPATH'].'config/'.ENVIRONMENT.'/mimes.php'))
			{
				$_mimes = include($_ENV['XJ_APPPATH'].'config/'.ENVIRONMENT.'/mimes.php');
			}
			elseif (file_exists($_ENV['XJ_APPPATH'].'config/mimes.php'))
			{
				$_mimes = include($_ENV['XJ_APPPATH'].'config/mimes.php');
			}
			else
			{
				$_mimes = array();
			}
		}

		return $_mimes;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_is_https'))
{
	/**
	 * Is HTTPS?
	 *
	 * Determines if the application is accessed via an encrypted
	 * (HTTPS) connection.
	 *
	 * @return	bool
	 */
	function xj_is_https()
	{
		if ( ! empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off')
		{
			return TRUE;
		}
		elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https')
		{
			return TRUE;
		}
		elseif ( ! empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off')
		{
			return TRUE;
		}

		return FALSE;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_is_cli'))
{

	/**
	 * Is CLI?
	 *
	 * Test to see if a request was made from the command line.
	 *
	 * @return 	bool
	 */
	function xj_is_cli()
	{
		return (PHP_SAPI === 'cli' OR defined('STDIN'));
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_sys_show_error'))
{
	/**
	 * Error Handler
	 *
	 * This function lets us invoke the exception class and
	 * display errors using the standard error template located
	 * in application/views/errors/error_general.php
	 * This function will send the error page directly to the
	 * browser and exit.
	 *
	 * @param	string
	 * @param	int
	 * @param	string
	 * @return	void
	 */
	function xj_sys_show_error($message, $status_code = 500, $title = 'An Error Was Encountered')
	{
		if ($_ENV['XJ_ENV'] !== 'development'){
			echo 'This is system error';
			exit(0);
		}
		$status_code = abs($status_code);
		if ($status_code < 100)
		{
			$exit_status = $status_code + 9; // 9 is EXIT__AUTO_MIN
			if ($exit_status > 125) // 125 is EXIT__AUTO_MAX
			{
				$exit_status = 1; // EXIT_ERROR
			}

			$status_code = 500;
		}
		else
		{
			$exit_status = 1; // EXIT_ERROR
		}

		//$_error =& load_class('Exceptions', 'core');
		//echo $_error->show_error($heading, $message, 'error_general', $status_code);
		$templates_path =  BASEPATH.'xj_core/views/';
		$template = "error";
		xj_set_status_header($status_code);
		$message = '<p>'.(is_array($message) ? implode('</p><p>', $message) : $message).'</p>';
		$template_file = $templates_path.$template.'.php';
		if (! file_exists($template_file)){
			echo "Not found file.[".$template_file."]";
			exit($exit_status);
		}
		ob_start();
		include($template_file);
		$buffer = ob_get_contents();
		ob_end_clean();
		echo $buffer;
		exit($exit_status);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_show_error'))
{
	/**
	 * Error Handler
	 *
	 * This function lets us invoke the exception class and
	 * display errors using the standard error template located
	 * in application/views/errors/error_general.php
	 * This function will send the error page directly to the
	 * browser and exit.
	 *
	 * @param	string
	 * @param	int
	 * @param	string
	 * @return	void
	 */
	function xj_show_error($message, $status_code = 500, $title = 'An Error Was Encountered')
	{
		$status_code = abs($status_code);
		if ($status_code < 100)
		{
			$exit_status = $status_code + 9; // 9 is EXIT__AUTO_MIN
			if ($exit_status > 125) // 125 is EXIT__AUTO_MAX
			{
				$exit_status = 1; // EXIT_ERROR
			}

			$status_code = 500;
		}
		else
		{
			$exit_status = 1; // EXIT_ERROR
		}

		//$_error =& load_class('Exceptions', 'core');
		//echo $_error->show_error($heading, $message, 'error_general', $status_code);
		$templates_path =  BASEPATH.'xj_core'.DIRECTORY_SEPARATOR."views".DIRECTORY_SEPARATOR;
		$template = "error";
		xj_set_status_header($status_code);
		$message = '<p>'.(is_array($message) ? implode('</p><p>', $message) : $message).'</p>';
		$template_file = $templates_path.$template.'.php';
		if (! file_exists($template_file)){
			echo "Not found file.[".$template_file."]";
			exit($exit_status);
		}
		ob_start();
		include($template_file);
		$buffer = ob_get_contents();
		ob_end_clean();
		echo $buffer;
		exit($exit_status);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_show_info'))
{
	/**
	 * Info Handler
	 *
	 * This function lets us invoke the exception class and
	 * display errors using the standard error template located
	 * in application/views/errors/error_general.php
	 * This function will send the error page directly to the
	 * browser and exit.
	 *
	 * @param	string
	 * @param	string
	 * @return	void
	 */
	function xj_show_info($message, $title = 'This is message.')
	{
		xj_show_error($message, 200, $title);
	}
}
// ------------------------------------------------------------------------

if ( ! function_exists('xj_show_404'))
{
	/**
	 * 404 Page Handler
	 *
	 * This function is similar to the show_error() function above
	 * However, instead of the standard error template it displays
	 * 404 errors.
	 *
	 * @param	string
	 * @param	bool
	 * @return	void
	 */
	function xj_show_404($page = '', $log_error = TRUE)
	{
		$_error =& load_class('Exceptions', 'core');
		$_error->show_404($page, $log_error);
		exit(4); // EXIT_UNKNOWN_FILE
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_log_message'))
{
	/**
	 * Error Logging Interface
	 *
	 * We use this as a simple mechanism to access the logging
	 * class and send messages to be logged.
	 *
	 * @param	string	the error level: 'error', 'debug' or 'info'
	 * @param	string	the error message
	 * @return	void
	 */
	function xj_log_message($level, $message)
	{
		static $_log;

		if ($_log === NULL)
		{
			// references cannot be directly assigned to static variables, so we use an array
			$_log[0] =& xj_load_class('Log');
		}

		$_log[0]->write_log($level, $message);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_set_status_header'))
{
	/**
	 * Set HTTP Status Header
	 *
	 * @param	int	the status code
	 * @param	string
	 * @return	void
	 */
	function xj_set_status_header($code = 200, $text = '')
	{
		if (xj_is_cli())
		{
			return;
		}

		if (empty($code) OR ! is_numeric($code))
		{
			show_error('Status codes must be numeric', 500);
		}

		if (empty($text))
		{
			is_int($code) OR $code = (int) $code;
			$stati = array(
				100	=> 'Continue',
				101	=> 'Switching Protocols',

				200	=> 'OK',
				201	=> 'Created',
				202	=> 'Accepted',
				203	=> 'Non-Authoritative Information',
				204	=> 'No Content',
				205	=> 'Reset Content',
				206	=> 'Partial Content',

				300	=> 'Multiple Choices',
				301	=> 'Moved Permanently',
				302	=> 'Found',
				303	=> 'See Other',
				304	=> 'Not Modified',
				305	=> 'Use Proxy',
				307	=> 'Temporary Redirect',

				400	=> 'Bad Request',
				401	=> 'Unauthorized',
				402	=> 'Payment Required',
				403	=> 'Forbidden',
				404	=> 'Not Found',
				405	=> 'Method Not Allowed',
				406	=> 'Not Acceptable',
				407	=> 'Proxy Authentication Required',
				408	=> 'Request Timeout',
				409	=> 'Conflict',
				410	=> 'Gone',
				411	=> 'Length Required',
				412	=> 'Precondition Failed',
				413	=> 'Request Entity Too Large',
				414	=> 'Request-URI Too Long',
				415	=> 'Unsupported Media Type',
				416	=> 'Requested Range Not Satisfiable',
				417	=> 'Expectation Failed',
				422	=> 'Unprocessable Entity',

				500	=> 'Internal Server Error',
				501	=> 'Not Implemented',
				502	=> 'Bad Gateway',
				503	=> 'Service Unavailable',
				504	=> 'Gateway Timeout',
				505	=> 'HTTP Version Not Supported'
			);

			if (isset($stati[$code]))
			{
				$text = $stati[$code];
			}
			else
			{
				show_error('No status text available. Please check your status code number or supply your own message text.', 500);
			}
		}

		if (strpos(PHP_SAPI, 'cgi') === 0)
		{
			header('Status: '.$code.' '.$text, TRUE);
		}
		else
		{
			$server_protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.1';
			header($server_protocol.' '.$code.' '.$text, TRUE, $code);
		}
	}
}

// --------------------------------------------------------------------

if ( ! function_exists('_error_handler'))
{
	/**
	 * Error Handler
	 *
	 * This is the custom error handler that is declared at the (relative)
	 * top of XJ.php. The main reason we use this is to permit
	 * PHP errors to be logged in our own log files since the user may
	 * not have access to server logs. Since this function effectively
	 * intercepts PHP errors, however, we also need to display errors
	 * based on the current error_reporting level.
	 * We do that with the use of a PHP error template.
	 *
	 * @param	int	$severity
	 * @param	string	$message
	 * @param	string	$filepath
	 * @param	int	$line
	 * @return	void
	 */
	function _error_handler($severity, $message, $filepath, $line)
	{
		$is_error = (((E_ERROR | E_COMPILE_ERROR | E_CORE_ERROR | E_USER_ERROR) & $severity) === $severity);

		// When an error occurred, set the status header to '500 Internal Server Error'
		// to indicate to the client something went wrong.
		// This can't be done within the $_error->show_php_error method because
		// it is only called when the display_errors flag is set (which isn't usually
		// the case in a production environment) or when errors are ignored because
		// they are above the error_reporting threshold.
		if ($is_error)
		{
			set_status_header(500);
		}

		// Should we ignore the error? We'll get the current error_reporting
		// level and add its bits with the severity bits to find out.
		if (($severity & error_reporting()) !== $severity)
		{
			return;
		}

		$_error =& load_class('Exceptions', 'core');
		$_error->log_exception($severity, $message, $filepath, $line);

		// Should we display the error?
		if (str_ireplace(array('off', 'none', 'no', 'false', 'null'), '', ini_get('display_errors')))
		{
			$_error->show_php_error($severity, $message, $filepath, $line);
		}

		// If the error is fatal, the execution of the script should be stopped because
		// errors can't be recovered from. Halting the script conforms with PHP's
		// default error handling. See http://www.php.net/manual/en/errorfunc.constants.php
		if ($is_error)
		{
			exit(1); // EXIT_ERROR
		}
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('_exception_handler'))
{
	/**
	 * Exception Handler
	 *
	 * Sends uncaught exceptions to the logger and displays them
	 * only if display_errors is On so that they don't show up in
	 * production environments.
	 *
	 * @param	Exception	$exception
	 * @return	void
	 */
	function _exception_handler($exception)
	{
		$_error =& load_class('Exceptions', 'core');
		$_error->log_exception('error', 'Exception: '.$exception->getMessage(), $exception->getFile(), $exception->getLine());

		// Should we display the error?
		if (str_ireplace(array('off', 'none', 'no', 'false', 'null'), '', ini_get('display_errors')))
		{
			$_error->show_exception($exception);
		}

		exit(1); // EXIT_ERROR
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('_shutdown_handler'))
{
	/**
	 * Shutdown Handler
	 *
	 * This is the shutdown handler that is declared at the top
	 * of XJ.php. The main reason we use this is to simulate
	 * a complete custom exception handler.
	 *
	 * E_STRICT is purposively neglected because such events may have
	 * been caught. Duplication or none? None is preferred for now.
	 *
	 * @link	http://insomanic.me.uk/post/229851073/php-trick-catching-fatal-errors-e-error-with-a
	 * @return	void
	 */
	function _shutdown_handler()
	{
		$last_error = error_get_last();
		if (isset($last_error) &&
			($last_error['type'] & (E_ERROR | E_PARSE | E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_COMPILE_WARNING)))
		{
			_error_handler($last_error['type'], $last_error['message'], $last_error['file'], $last_error['line']);
		}
	}
}

// --------------------------------------------------------------------

if ( ! function_exists('xj_remove_invisible_characters'))
{
	/**
	 * Remove Invisible Characters
	 *
	 * This prevents sandwiching null characters
	 * between ascii characters, like Java\0script.
	 *
	 * @param	string
	 * @param	bool
	 * @return	string
	 */
	function xj_remove_invisible_characters($str, $url_encoded = TRUE)
	{
		$non_displayables = array();

		// every control character except newline (dec 10),
		// carriage return (dec 13) and horizontal tab (dec 09)
		if ($url_encoded)
		{
			$non_displayables[] = '/%0[0-8bcef]/';	// url encoded 00-08, 11, 12, 14, 15
			$non_displayables[] = '/%1[0-9a-f]/';	// url encoded 16-31
		}

		$non_displayables[] = '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S';	// 00-08, 11, 12, 14-31, 127

		do
		{
			$str = preg_replace($non_displayables, '', $str, -1, $count);
		}
		while ($count);

		return $str;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_html_escape'))
{
	/**
	 * Returns HTML escaped variable.
	 *
	 * @param	mixed	$var		The input string or array of strings to be escaped.
	 * @param	bool	$double_encode	$double_encode set to FALSE prevents escaping twice.
	 * @return	mixed			The escaped string or array of strings as a result.
	 */
	function xj_html_escape($var, $double_encode = TRUE)
	{
		if (empty($var))
		{
			return $var;
		}

		if (is_array($var))
		{
			foreach (array_keys($var) as $key)
			{
				$var[$key] = html_escape($var[$key], $double_encode);
			}

			return $var;
		}

		return htmlspecialchars($var, ENT_QUOTES, config_item('charset'), $double_encode);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('_stringify_attributes'))
{
	/**
	 * Stringify attributes for use in HTML tags.
	 *
	 * Helper function used to convert a string, array, or object
	 * of attributes to a string.
	 *
	 * @param	mixed	string, array, object
	 * @param	bool
	 * @return	string
	 */
	function _stringify_attributes($attributes, $js = FALSE)
	{
		$atts = NULL;

		if (empty($attributes))
		{
			return $atts;
		}

		if (is_string($attributes))
		{
			return ' '.$attributes;
		}

		$attributes = (array) $attributes;

		foreach ($attributes as $key => $val)
		{
			$atts .= ($js) ? $key.'='.$val.',' : ' '.$key.'="'.$val.'"';
		}

		return rtrim($atts, ',');
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_function_usable'))
{
	/**
	 * Function usable
	 *
	 * Executes a function_exists() check, and if the Suhosin PHP
	 * extension is loaded - checks whether the function that is
	 * checked might be disabled in there as well.
	 *
	 * This is useful as function_exists() will return FALSE for
	 * functions disabled via the *disable_functions* php.ini
	 * setting, but not for *suhosin.executor.func.blacklist* and
	 * *suhosin.executor.disable_eval*. These settings will just
	 * terminate script execution if a disabled function is executed.
	 *
	 * The above described behavior turned out to be a bug in Suhosin,
	 * but even though a fix was commited for 0.9.34 on 2012-02-12,
	 * that version is yet to be released. This function will therefore
	 * be just temporary, but would probably be kept for a few years.
	 *
	 * @link	http://www.hardened-php.net/suhosin/
	 * @param	string	$function_name	Function to check for
	 * @return	bool	TRUE if the function exists and is safe to call,
	 *			FALSE otherwise.
	 */
	function xj_function_usable($function_name)
	{
		static $_suhosin_func_blacklist;

		if (function_exists($function_name))
		{
			if ( ! isset($_suhosin_func_blacklist))
			{
				$_suhosin_func_blacklist = extension_loaded('suhosin')
					? explode(',', trim(ini_get('suhosin.executor.func.blacklist')))
					: array();
			}

			return ! in_array($function_name, $_suhosin_func_blacklist, TRUE);
		}

		return FALSE;
	}
}
// ------------------------------------------------------------------------
$xj_final_output='';

// ------------------------------------------------------------------------

if (!function_exists('xj_output_append'))
{
	/**
	 * Append Output
	 *
	 * Appends data onto the output string.
	 *
	 * @param	string	$output	Data to append
	 * @return	XJ_Output
	 */
	function xj_output_append($output)
	{
		global $xj_final_output;
		$xj_final_output .= $output;
		return $xj_final_output;
	}
}
if (!function_exists('xj_output_display'))
{
	/**
	 * Append Output
	 *
	 * Appends data onto the output string.
	 *
	 * @param	string	$output	Data to append
	 * @return	XJ_Output
	 */
	function xj_output_display($output = '')
	{
		global $xj_final_output;
		$xj_final_output .= $output;
		echo $xj_final_output;
		//xj_show_info($xj_final_output);
		return ;
	}
}
// ------------------------------------------------------------------------

if (!function_exists('xj_load_view'))
{
	/* load_view
	 * Loads "view" files.
	 *
	 * @param	string	$view	View name
	 * @param	array	$vars	An associative array of data
	 *				to be extracted for use in the view
	 * @param	bool	$return	Whether to return the view output
	 *				or leave it to the Output class
	 * @return	object|string
	 * */
	function xj_load_view($view, $vars = array(), $return = FALSE)
	{
		$_cached_vars = array();
		$_path_file = $_ENV['XJ_APPPATH']."views".DIRECTORY_SEPARATOR.$view;
		if (!file_exists($_path_file))
		{
			$_path_file = $_ENV['XJ_PUBPATH']."views".DIRECTORY_SEPARATOR.$view;
			if (!file_exists($_path_file))
			{
				$_path_file_ = BASEPATH.'xj_core'.DIRECTORY_SEPARATOR."views".DIRECTORY_SEPARATOR.$view;
				if (!file_exists($_path_file_))
				{
					xj_show_error('Unable to load the requested file: '.$_path_file);
				}
				$_path_file = $_path_file_;
			}
		}
		if (is_array($vars))
		{
			foreach (array_keys($vars) as $key)
			{
				if (strncmp($key, '_xj_', 4) === 0)
				{
					unset($vars[$key]);
				}
			}
			$_cached_vars = array_merge($_cached_vars, $vars);
		}
		$_cached_vars = array_merge($_cached_vars, $_ENV);
		extract($_cached_vars);
		/*
		 * Buffer the output
		 *
		 * We buffer the output for two reasons:
		 * 1. Speed. You get a significant speed boost.
		 * 2. So that the final rendered template can be post-processed by
		 *	the output class. Why do we need post processing? For one thing,
		 *	in order to show the elapsed page load time. Unless we can
		 *	intercept the content right before it's sent to the browser and
		 *	then stop the timer it won't be accurate.
		 */
		ob_start();
		
		// If the PHP installation does not support short tags we'll
		// do a little string replacement, changing the short tags
		// to standard PHP echo statements.
		if ( ! xj_is_php('5.4') && ! ini_get('short_open_tag') )
		{
			echo eval('?>'.preg_replace('/;*\s*\?>/', '; ?>', str_replace('<?=', '<?php echo ', file_get_contents($_path_file))));
		}
		else
		{
			include($_path_file); // include() vs include_once() allows for multiple views with the same name
		}
		
		// Return the file data if requested
		if ($return === TRUE)
		{
			$buffer = ob_get_contents();
			@ob_end_clean();
			return $buffer;
		}

		xj_output_append(ob_get_contents());
		@ob_end_clean();
	}
}

if ( ! function_exists('xj_int32_to_hex'))
{
	function xj_int32_to_hex($value) {
		$value = intval($value);
		$value &= 0xffffffff;
		return str_pad(strtoupper(dechex($value)), 8, "0", STR_PAD_LEFT);
	}
}
if ( ! function_exists('xj_hex_to_int32'))
{
	function xj_hex_to_int32($value) {
		$value = strval($value);
		return hexdec($value);
	}
}
if ( ! function_exists('xj_signature'))
{
	function xj_signature($data){
		isset($_ENV['XJ_KEY'])?$data.=$_ENV['XJ_KEY']:$data;
		isset($_ENV['XJ_CLIENT_ID'])?$data.=$_ENV['XJ_CLIENT_ID']:$data;
		//isset($_ENV['XJ_APP_KEY'])?$data.=$_ENV['XJ_APP_KEY']:$data;
		$checksum = crc32(strval($data));
		$tmpStr = xj_int32_to_hex($checksum);
		return $tmpStr;
	}
}
if ( ! function_exists('xj_redirect'))
{
	/**
	 * Header Redirect
	 *
	 * Header redirect in two flavors
	 * For very fine grained control over headers, you could use the Output
	 * Library's set_header() function.
	 *
	 * @param	string	$uri	URL
	 * @param	string	$method	Redirect method
	 *			'auto', 'location' or 'refresh'
	 * @param	int	$code	HTTP Response status code
	 * @return	void
	 */
	function xj_redirect($uri = '', $method = 'auto', $code = NULL)
	{
		if ( ! preg_match('#^(\w+:)?//#i', $uri))
		{
			//$uri = site_url($uri);
		}

		// IIS environment likely? Use 'refresh' for better compatibility
		if ($method === 'auto' && isset($_SERVER['SERVER_SOFTWARE']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== FALSE)
		{
			$method = 'refresh';
		}
		elseif ($method !== 'refresh' && (empty($code) OR ! is_numeric($code)))
		{
			if (isset($_SERVER['SERVER_PROTOCOL'], $_SERVER['REQUEST_METHOD']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.1')
			{
				$code = ($_SERVER['REQUEST_METHOD'] !== 'GET')
					? 303	// reference: http://en.wikipedia.org/wiki/Post/Redirect/Get
					: 307;
			}
			else
			{
				$code = 302;
			}
		}

		switch ($method)
		{
			case 'refresh':
				header('Refresh:0;url='.$uri);
				break;
			default:
				header('Location: '.$uri, TRUE, $code);
				break;
		}
		exit;
	}
}

if ( ! function_exists('xj_implode_url'))
{
	function xj_implode_url($url)
	{
		if (! is_array($url)){
			return '';
		}
		if (! isset($url['scheme']))
		{
			$url['scheme'] = 'http';
		}
		if (! isset($url['port']))
		{
			$url['port'] = 80;
		}
		if (! isset($url['host']))
		{
			$url['host'] = 'localhost';
		}
		if (! isset($url['path']))
		{
			$url['path'] = '';
		}elseif (! empty($url['path'])){
			if (substr($url['path'], 0, 1) != '/'){
				$url['path'] = '/'.$url['path'];
			}
		}
		$pageURL = $url['scheme'].'://';
		$pageURL .= $url['host'];
		$pageURL .= ((intval($url['port']) == 80)?'':':'.$url['port']);
		$pageURL .= ((! isset($url['path']) || empty($url['path']))?'':$url['path']);
		$pageURL .= ((! isset($url['query']) || empty($url['query']))?'':'?'.$url['query']);
		$pageURL .= ((! isset($url['fragment']) || empty($url['fragment']))?'':'#'.$url['fragment']);
		return $pageURL;
	}
}
function xj_current_url()
{
	$pageURL = 'http';

	if ($_SERVER["HTTPS"] == "on")
	{
		$pageURL .= "s";
	}
	$pageURL .= "://";

	if ($_SERVER["SERVER_PORT"] != "80")
	{
		$pageURL .= $_SERVER["SERVER_NAME"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];
	}
	else
	{
		$pageURL .= $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"];
	}
	return $pageURL;
}

// ------------------------------------------------------------------------

if ( ! function_exists('xj_site_url'))
{
	/**
	 * Site URL
	 *
	 * Create a local URL based on your basepath. Segments can be passed via the
	 * first parameter either as a string or an array.
	 *
	 * @param	string	$uri
	 * @param	string	$protocol
	 * @return	string
	 */
	function xj_site_url($uri = '', $protocol = NULL)
	{
		global $XJ;
		if (isset($XJ)) return $XJ->config->site_url($uri, $protocol);
		return $uri;
	}
}
